Please be aware that the Roku 3 is an older device that is no longer under warranty. It's possible that the remote may be on its way out. If you need a replacement remote for your device, you can find a compatible remote on our Products page here: https://www.roku.com/products/accessories
The remote drains the batteries about every 1.5 days. I already tried resetting the system to the factory default in addition to removing the batteries, unplugging the box for 5 seconds, putting the batteries back in, and using the pairing button. Batteries still keep draining.